These functions are driven by the self-winding 2385 caliber, a motor running at 4hz providing 40 hours link of power reserve, housed in a rose gold case 38mm in diameter. This can be viewed on the wrist thanks to its link bracelet equipped with a folding clasp.

Lightness is a priority in the Series 10. The aluminum models are 10% lighter than the previous generation. Most importantly, for the Series 10, Apple ditches stainless steel in the brand's premium lineup for grade 5 titanium. Fully polished and then PVD-coated in natural, gold, and slate grey colorways, this new premium lineup is made of 95% recycled titanium and now allows Apple to achieve carbon neutrality across the link entire Apple Watch lineup.